Double safety-envelop.



A. KRAMER;

DOUBLE SAFETY ENVELOP. APPUCATION man SEFT.'17. 1917. RENEWED ocr.4.19m.

1 ,285,238. Patented Nov. 19, 1918.

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ABE em nates nus MOINES, town.

7 DOUBLE. SAFETY-ENVELOP."

Specification of Letters Patent. V Patented NOV. 19, 1918.

Application filed September 17, 1917, Serial No. 191.886.. RenewedOctober 4, 1918. Serial No. 256 916.

To all whom it may concern:

Beit known that I, ABE 'KRAMER, a citizen of the United States, andresident of Des Moines, in the county of Polk and State of Iowa, haveinvented a certain new and useful Double Safety-Envelop, of which thefollowing is a specification.

The object of my inventionis to provide n envelop, the inside of whichmay be used for. wr'itingif desired, but which is particularly designedto afford safety against beingopene-d during the transmission of mail.

More particularly it is my object to provide such an envelop, which canbe folded and sealed in such a way as'to provide av Fig. 2 shows a viewof the back of the envelop partially closed and sealed.

Fig. 3 shows a similar view of the envelop completely sealed and usingboth the first and second safety devices.

Fig. 4. shows a similar view with a slightly different way of closingand scaling the envelop, and

Fig. 5 shows a sectional view through the envelop shown in Fig. 4 takenon the line of said Fig. 4. I

In the accompanying drawings, I have used the reference numeral 10 toindicate generally the ordinary front of an envelop having the end wings11, the lower flap 12 and the upper flap 13.

The lower flap is provided with a longitudinally arranged slit 14:. Inconnection with the lower flap I provide an auxiliary strip 15 slightlylongerthan the slit la and having secured to one edge a tongue 16 whichmay be slightly tapered, as shown in Fig. 1, and which has a gummedportion 17 on one side, as shown.

The end 0f thetongut; 16, at the point its juncture with the strip 15 isof such widthto slip through the slit l ly A At the ends of thestrip 15are short tongues 18, designed to overlap the lower flap 12 adjacent tothe ends of the slit 1%.

Mucilage orgum or thelike 9 is provided on the surface of the strip 15.The

flap 13 is provided witha central tongue and is also'provided, with aslit/21 having .its central portion U-shaped, as at 21?, as

shown inFig. 1. I I

The edge of the flap 13 is gummedat 22. In the practical use of myimproved safety envelop, the end wings ,11 are folded over, as

shown in Figs. 2, 3 and i. The flap 12 is then folded over, as shown inFig. 2, along the line 23. The 'top flap 13 is then folded over alongthe line 2% and the tongue 20 is moistened and shpped through the slot14 in the interior of the envelop where it will adhere to the gummedsurface 19 of the strip 15, thereby forming a first safety device, soarranged that the envelop cannot be opened without showing that it hasbeen tampered with.

It will be seen that the strip 15 and the slot 21 may be dispensed withand the tongue 20 may be made to coast with the slot, 14 to form asafety device. used the tongue 20 is inserted through the slot 14. Whenthe envelop is closed, a gum may be provided either on the flap 12 orthe under side of tongue 20, which may be moistened to seal the tonguein place. When this construction is used the sticking gum will have twothicknesses of paper-on either side of it, so that it will be almostimpossible to steam the envelop whereby the gum on the tongue 20 may beloosened.

In order, however, to afford even greater security, I have provided asecond safety device. The tongue 16 can lee-simply folded down againstthe outer side of the flap 13 and secured thereto by moistening thegummed surface 17 leaving the envelop in the condition shown in Figs; orthe tongue 25, formed by the portion 21 of the slit 21, may

be slightly raised and the tongue 16 inserted through the slit 21, afterhaving its gummed surface moistened, for thereby fastening the partstogether and affording a second safety means. In this connection it maybe mentioned that the surface of the tongue 25 is When the device is so1 tin gunnned at 26, so that said guinnied surface 26 may be inoistenedfor fastening the tongue 25 down to the tongue 16.

The outer surface oi? the tongue 16 is also provided with gum orinucilage near its top at it will thus "be seen that l have atlorded avdouble safety device so that there is no pos sibility of tampering withthe envelop or opening it in any way Without visible evidences of suchtampering being disclosed.

It is my intention to cover by my claims any modified forms of structureor use of mechanical equivalents which may be reasonably included Withinthe scope of nrv claims.

I claim as my invention:

1. A safety envelop comprising a front, end Wings folded over said frontportion, a lower flap having a longitudinal slit adjacent to its freeedge, an auxiliary strip of greater length than said slit and having atongue extended therefrom through the slit away from'saidtlap,'said'strip and tongue both having their surfaces adjacent tosaid flap guinnied, and an upper flap having a longitudinal slit thereinadjacent to its tree edge of greater length than the width of saidtongue, said upper flap having a tongue projecting from the free edgethereof and having its edges adjacent to the tongue gunnned.

A safety envelop comprising a front, end Wings folded over said frontportion, a lower flap having a longitudinal slit adjacent to its freeedge, an auxiliary strip of greater length than said slit and having atongue extended therefrom through the slit away from said flap. saidstrip and tongue both having their surfaces adjacent to said tlapguinnied, an upper flap having a longi tudinal slit therein adjacent toits free edge comprising straight end portions and a U- shaped centralportion whereby a tab may be formed, which may be grasped to pull apartthe tvvo edges of the slit to more readily permit the entrance of thetongue, and a second tongue of less Width than the length of the firstdescribed slit whereby said last described tongue may be insertedthrough said first described slit between the lower flap and saidauxili: ry strip.

Des ll'loines loiva, Elepternber 13 1917.

ABE KRAMER.

Sopies of this patent may be obtained for five cents each, by addressingthe Gommissioner or Eatents,

I asnington, 33. c.

